how to write f(x,y) (digital image) in matlab code ?

i want to make a function for feature extraction, in the method there is a formula f(x,y) that express the value intensity in (x,y) coordinat pixel. How i write f(x,y) in matlab code? thank you

[Devi Timilsina]

Hi ElizabethR, I am also looking for the answer of your question. you might have finished your zernike moments project until now. I am doing Discrete orthogonal hahn's moments and I am stuck in very early stage. Please help me. you can email me at [e-mail] . Please help

Answer 1

[Explorer]

I don't know what formula you are talking about but the general method to make a function in MATLAB is as follows:

Let' say you want to make a function for finding voltage using Ohms Law

Open script file, write:

function [v]=ohm(i,r) % 'i' and 'r' will be inputs
v=i*r
end

save it as ohm.m

Now, you can call your function in command windows as follows:

i=2; r=4;
ohm(i,r)

[ElizabethR]

Thanks for your explanation,

i want to make Zernike moments function to extraction feature of an image.

here the formula :

z_pq= (p+1)/π ∑_x ∑_x f(y,x) V_pq (y,x)

f(y,x) is the value intensity pixel in coordinate (y,x). So how to translate it to matlab code ?